Machine for mixing mortar or concrete



Y H. W. CALDWELL. MACHINE POR MIXING MONTAR 0R CONCRETE. No. 264.861.

um ummm w?? UNITED STATES HENRY W. CALDWELL,

PATENTV OFFICE.

Or cHIoAcO, ILLINOIS.

MACHINE FOR MIXING MORTAR OR CONCRETE.

SPECIFICATION forming part of' Letters Patent No. 264,861, dated September 26, 1882.

Application filed July 15,1882. (No model.)

To all whom tt mag/,concern Beit known that I, HENRY' W. CALDWELL, of Chicago, in the county ot' Cook and State of Illinois, haveinvented certain new and usefnl Improvements in Machines for Mixing Mortar or Concrete; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompan yin g drawings, and to the letters of reference marked thereon, which form` a part of this specification. 4

This invention relates to devices ormachines for mixing the materials for mortar or concrete-as sand, gravel, broken stone, or cinders-with lime or hydraulic celnentand water, so as to make a homogenial mass thereof that is ready for use; and it is my Object to produce a machine which will do the work of mixing with dispatch, and that is simple in its construction, is strong and durable, and is casily set up and transported.

The invention consists in the use of a conveyer-screw arranged in the'manner hereinafter described and specifically claimed.

In the accompanyingdrawings, Figure l represents a longitudinal vertical section of the entire machine; Fig. 2, a cross-section of the same, and Fig. 3 a sectional elcvation'of the conveyer-scrcw.

lCorrespondin g letters in the several gures of the drawings designate like parts.

A denotes the oonveyer-screw. That preferably is constructed according to specification ot' reissued Letters Patent No. 6,838, which were granted to me on January 4, 1876. This conveyer-screw may be made up of sections to suit the desired length, and is suspended by hanger-bearings a within a box or trough, B, that is of a size to allow sufficient room at the sides and bottom of the conveyerscrew for a stone to passwitho'ut doing damage. This trough B may be made Of metal or of wood that is lined with metal, and is closed at one end where the conveyer-shaft is propulley, C, for driving such conveyer-screw by a belt; or a gear-wheel or crank may be ap plied for rotating such conveyer-screw. Over this end of the conveyer-box is arranged a hopper, D, into which the several materials are dumped that are to be mixed. The Opposite end of trough B is open, and has a downward spout, E, for discharging the mixed mass of mortar or concrete. A faucet,4 F, is placed about two-thirds of the entire length ot' trough B away from the hopper. This faucet F connects with the hydrant Or a tank by a pipe or hose, and is to admit the necessary water to be mixed with the material after such material has been thoroughly mixed in a dry state during the first two-thirds of' its course through the conveyertrough.

The several ingredients or materials necessary for mortar or concreteas broken stone,

g gravel, sand, cinders, lime, or hydraulic cement-are measured to proper proportions, and are dumped Or shoveled into the hopper D, where Vthe conveyer-screw in forwarding them toward the other end will thoroughly mix the particles ot the several ingredients first in a dry state and then with the water, and will discharge the product in a homogenial condition through spout E into a cart or wagonbox to be carried oft' to the building-site where it is to be used. f

As will be noticed, the above-described Inachine or apparatus is exceedingly simple in its construction, cannotwell get out of Order or break down, is easily repaired in case of' an accident, and will do its intended work in a thorough manner without requiring much driving-power.

l. A machine for mixing mortar or concre te, principally composed of conveyor screw A, suspended by hangers a in a trough, B, having hopper D, and being provided with faucet F, allsubstantiall y as and for the purpose set forth.

2. In a machine for mixing mortag- Or concrete, the conveyer-screw A, suspended by hangers a in a trough, B,"and having drivingpulleys C, such trough being provided with hopper D at one end, spout E at its Opposite end, and faucet F at an intermediate point, the whole being constructed and arranged to operate substantially in the manner described.

In testimony that I claim the foregoing as Witnesses:

MYRON NORTH,

DWIGHT COOKE.

my invention I attlx my signature in presence 

